1263327685966 has 16 divisors (see below), whose sum is σ = 1962021754800. Its totient is φ = 609357894208.

The previous prime is 1263327685951. The next prime is 1263327685967. The reversal of 1263327685966 is 6695867233621.

It is a junction number, because it is equal to n+sod(n) for n = 1263327685898 and 1263327685907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263327685967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9296911 + ... + 9431818.

It is an arithmetic number, because the mean of its divisors is an integer number (122626359675).

Almost surely, 2^{1263327685966} is an apocalyptic number.

1263327685966 is a deficient number, since it is larger than the sum of its proper divisors (698694068834).

1263327685966 is a wasteful number, since it uses less digits than its factorization.

1263327685966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18729923.

The product of its digits is 117573120, while the sum is 64.

The spelling of 1263327685966 in words is "one trillion, two hundred sixty-three billion, three hundred twenty-seven million, six hundred eighty-five thousand, nine hundred sixty-six".